Since you'll already be bleeding the system, it wouldn't hurt anything to change those rear flex hoses. If they have cracks, especially at the caliper end where the fitting is crimped onto the rubber, they're done for.

As for the pads, it makes no difference r.e. the brand of caliper. There is a break around m.y. 1979. The year of the car is much more important.

If possible, a few days prior to actual installation, clean the area surrounding the hard-line/flex-hose junction THOROUGHLY and apply your favorite penetrating oil to the unoin. BE VERY CAREFUL WITH THESE!!! If you toast the flats on the fitting (especially on the p.s.) your day will not go as planned. Napa carries metric brake hard-lines, so don't waste time/money getting one from MB, as it probably won't fit any better than, say, a 36" chunk from Napa. If you have a bubble flare tool then you can cut either down to fit exactly. Regardless, this entails considerable extra effort. Cooking the thing a little is advisable, though I prefer an electric heat gun under circumstances such as these....

Jay.

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On the road, currently:
'83 300D (German spec.) 168k mi. - - Wolfgang (tucked snugly away for the winter!)
'87 300D 375k mi. - finally went over to "The Dark Side"
'87 300TD 225k mi.
Cannondale 66cm CAAD5 w/Campy/Jamis Aurora
Hujsak Custom Fixie/Landshark Track Shark Custom/Ahearne Custom 29'er